Abstract
A tungsten/copper graded composite is newly developed as a new material against high heat flux, for example, plasma, ion beam, electron beam and so on. A sintering and infiltration technique is proposed for fabricating process of the tungsten/copper graded composite. The technique is very useful for combining two materials with much difference in melting point as a combination of the tungsten and the copper. In this paper, each process condition for preparating the tungsten/copper graded composite is established. It is shown that a sintered tungsten with graded pores is fabricated by sintering stacked tungsten powders from small size to large size, and that a capsule-free HIP (hot isostatic pressing) treatment of the sintered tungsten with graded pores is very useful to reduce closed pores, and that a molten copper is well infiltrated into open pores of the sintered tungsten with graded pores by HIP treatment.
